--- a/PresetMaps.wiki	Thu Nov 07 17:58:56 2013 +0000
+++ b/PresetMaps.wiki	Sat Nov 16 14:44:32 2013 +0000
@@ -60,14 +60,14 @@
   * Usually _width/length ratio_ of 2:1
   * Typical size: 2048 x 1024
   * Max size: no limit, 0.9.18+.  4096 x 2048 or less in 0.9.17 and earlier.  There are a few practical limits to map size that should be examined for people trying to make very large maps.
-    * SDL 1.2 - SDL 1.2 can only load maps that are 16,384px wide or less, and 65,536px high or less.
+    * SDL 1.2 - SDL 1.2 can only load maps that are <=16,384px wide, and <=65,536px high.
     * SDL 2.0 - SDL 2.0 failed to load a 999,936x512 map. A 499,968x512 map succeeded. Those would use ~244MiB/~122MiB of your graphics card with Blurry Land enabled, and ~977MiB/~488MiB without it.
     * GIMP.  GIMP 2.8 can only create PNGs that are 262,144px wide or high - is an arbitrary hardcoded sanity check.  GIMP 2.10 allows 524,288 wide or high.
     * libpng - libpng can only load maps that are < 1 million px wide or high, with default configuration.
     * Graphics card. This is the big one. Your graphics card probably has anywhere from 256MiB to 2GiB of vRAM.  If blurry land is enabled and the map has a typical amount of empty space, you can make a map w/ ~2x the pixels as a card has vRAM. But. Most people don't like using Blurry Land, so best to limit to ~½ the pixels as a card has vRAM. Targetting support for people on 256MiB of vRAM, that means a 2:1 rectangular map should not be larger than 16,384x8192 which coincidentally fits in the SDL 1.2 width limit.
     * There is also a completely arbitrary check in game for widths/height < ~billion pixels which avoids possible integer issues, and a limit on size in pixels of 6 billion or so, which was just a basic sanity limit.  However given the limitations above, these are not likely to be reached.
   * If there is no _mask.png_, this image will also be used for deciding what pixels are subject to collision: _alpha value_ not equal to 0 (so below max transparency) will be considered land
-  * As of 0.9.19+, map.png is optional if a mask.png is provided.  If there is no map.png, the theme will be used to decorate the map.
+  * As of 0.9.19+, map.png is optional if a mask.png is provided.  If there is no map.png, the theme will be used to decorate the map.  No objects will be added to white areas.  Use black if you want objects.
 
 === preview.png ===
 Preview image of the map